Spiral separation type coal separation technology

Abstract

The invention discloses a spiral separation type coal separation technology. Four spiral separation machines and three collecting troughs are adopted, one separation machine is arranged at the top, three separation machines are arranged at the bottom, and the three collecting troughs are positioned at the bottoms of the three spiral separation machines. Three collecting troughs are arranged at the bottom of each separation machine. The coal separation method comprises the following steps: feeding a coal material from the first spiral separation machine; after the coal material becomes refined coal, medium coal and tail coal, respectively feeding the refined coal, the medium coal and the tail coal into three spiral separation machines, and carrying out separation; and finally, obtaining higher purities of refined coal, medium coal and tail coal. Through a coal secondary spiral separation structure and technology, the purities of refined coal, medium coal and tail coal, obtained after final separation, are higher than those of refined coal, medium coal and tail coal, obtained through a primary spiral separation technology.

Description

technical field [0001] The invention relates to a coal preparation technology, in particular to a spiral separation coal preparation technology. Background technique [0002] Spiral coal preparation technology refers to the technology of classifying coal preparation using a spiral separator. A spiral separator is a sorting device that relies on liquid flow characteristics to separate minerals of different densities under the action of gravity and centrifugal force. Since the early 1990s, the spiral separator has been used in the coal preparation industry for separating 3-0.15mm coarse coal slime. In coal-producing countries such as the United States and Australia, spiral separators have been widely used. [0003] The material is fed from the upper end of the spiral separator and rotates along the spiral groove. During the rotary movement of the liquid flow in the spiral groove, along the inner side to the outer side of the groove, the density of the water layer gradually i...

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Problems solved by technology

But this method also has a problem, that is, the purity of clean coal, medium coal, and tailing coal is still relatively low due to the separation of only one spiral separator.

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